Function IGetControlPoints( _
   ByVal Count As Integer, _
   ByRef ControlPoints As Double _
) As Boolean

Dim instance As ISplineParamData
Dim Count As Integer
Dim ControlPoints As Double
Dim value As Boolean
 
value = instance.IGetControlPoints(Count, ControlPoints)

bool IGetControlPoints( 
   int Count,
   out double ControlPoints
)

bool IGetControlPoints( 
&   int Count,
&   [Out] double ControlPoints
) 

Parameters

Count

Size of ControlPoints array

ControlPoints

• in-process, unmanaged C++: Pointer to an array of doubles

VBA, VB.NET, C#, and C++/CLI: Not supported

 

See In-process Methods for details about this type of method.

Return Value

Before calling this method, call ISplineParamData::ControlPointsCount to populate the Count parameter.

Control points determine the shape of a spline or curve. Starting with a set control points, all other points of a spline can be calculated. A given point on the spline is calculated using the polynomial basis functions of its nearest control points. The knot vector determines which control point basis functions are in force for calculating each point along a curve.

The size of the ControlPoints array is based on the curve dimension:

• if dimension = 2 then each Control Point has 2 doubles ( x, y )

• if dimension = 3 then each Control Point has 3 doubles ( x, y, z)

• if dimension = 4 then each Control Point has 4 doubles ( x, y, z, w ) where w = weight

Size of ControlPoints array = control points count X dimension